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Wu X, Zhang Y, Han Y, Zhang Y, Zhang Y, Cheng X, Zhong P, Yuan X, Zhang Y, Li Z. Advances in methane emissions from agricultural sources: Part I. Accounting and mitigation. J Environ Sci (China) 2024; 140:279-291. [PMID: 38331508 DOI: 10.1016/j.jes.2023.08.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 08/27/2023] [Accepted: 08/27/2023] [Indexed: 02/10/2024]
Abstract
Methane is one of the major greenhouse gases (GHGs) and agriculture is recognized as its primary emitter. Methane accounting is a prerequisite for developing effective agriculture mitigation strategies. In this review, methane accounting methods and research status for various agricultural emission source including rice fields, animal enteric fermentation and livestock and poultry manure management were overview, and the influencing factors of each emission source were analyzed and discussed. At the same time, it analyzes the different research efforts involving agricultural methane accounting and makes recommendations based on the actual situation. Finally, mitigation strategies based on accounting results and actual situation are proposed. This review aims to provide basic data and reference for agriculture-oriented countries and regions to actively participate in climate action and carry out effective methane emission mitigation.
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Affiliation(s)
- Xiaokun Wu
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071003, China
| | - Ying Zhang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071003, China
| | - Yinghui Han
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China.
| | - Yagang Zhang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071003, China; Interdisciplinary Mathematics Institute, University of South Carolina, Columbia, SC 29208, United States.
| | - Yuhang Zhang
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071003, China
| | - Xiaodan Cheng
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071003, China
| | - Pei Zhong
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; Hebei Key Laboratory of Physics and Energy Technology, North China Electric Power University, Baoding 071003, China
| | - Xue Yuan
- State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing 102206, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Yuanxun Zhang
- College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 101408, China
| | - Zhengqiang Li
- Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100094, China
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Li X, Wei C, Jin Y, Zhang J, Zhong P, Zhang D, Huang X. Time-resolved map of serum metabolome profiling in D-galactose-induced aging rats with exercise intervention. iScience 2024; 27:108999. [PMID: 38362265 PMCID: PMC10867647 DOI: 10.1016/j.isci.2024.108999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Revised: 10/07/2023] [Accepted: 01/19/2024] [Indexed: 02/17/2024] Open
Abstract
Exercise, an intervention with wide-ranging effects on the whole body, has been shown to delay aging. Due to aging and exercise as modulator of metabolism, a picture of how exercise delayed D-galactose (D-gal)-induced aging in a time-resolved manner was presented in this paper. The mapping of molecular changes in response to exercise has become increasingly accessible with the development of omics techniques. To explore the dynamic changes during exercise, the serum of rats and D-gal-induced aging rats before, during, and after exercise was analyzed by untargeted metabolomics. The variation of metabolites was monitored to reveal the specific response to D-gal-induced senescence and exercise in multiple pathways, especially the basal amino acid metabolism, including glycine serine and threonine metabolism, cysteine and methionine metabolism, and tryptophan metabolism. The homeostasis was disturbed by D-gal and maintained by exercise. The paper was expected to provide a theoretical basis for the study of anti-aging exercise.
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Affiliation(s)
- Xue Li
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu, Sichuan Province 610041, China
| | - Changling Wei
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu, Sichuan Province 610041, China
| | - Yu Jin
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu, Sichuan Province 610041, China
| | - Jinmei Zhang
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu, Sichuan Province 610041, China
| | - Pei Zhong
- iCarbonX Diagnostics (Zhuhai) Company Limited, Zhuhai, Guangdong Province 518110, China
| | - Deman Zhang
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu, Sichuan Province 610041, China
| | - Xiaohan Huang
- School of Sports Medicine and Health, Chengdu Sport University, Chengdu, Sichuan Province 610041, China
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Mishra A, Medairos R, Chen J, Soto-Palou F, Antonelli J, Preminger GM, Lipkin ME, Zhong P. Exploring optimal settings for safe and effective thulium fibre laser lithotripsy in a kidney model. BJU Int 2024; 133:223-230. [PMID: 37942684 PMCID: PMC10947524 DOI: 10.1111/bju.16218] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2023]
Abstract
OBJECTIVES To explore the optimal laser settings and treatment strategies for thulium fibre laser (TFL) lithotripsy, namely, those with the highest treatment efficiency, lowest thermal injury risk, and shortest procedure time. MATERIALS AND METHODS An in vitro kidney model was used to assess the efficacy of TFL lithotripsy in the upper calyx. Stone ablation experiments were performed on BegoStone phantoms at different combinations of pulse energy (EP ) and frequency (F) to determine the optimal settings. Temperature changes and thermal injury risks were monitored using embedded thermocouples. Experiments were also performed on calcium oxalate monohydrate (COM) stones to validate the optimal settings. RESULTS High EP /low F settings demonstrated superior treatment efficiency compared to low EP /high F settings using the same power. Specifically, 0.8 J/12 Hz was the optimal setting, resulting in a twofold increase in treatment efficiency, a 39% reduction in energy expenditure per unit of ablated stone mass, a 35% reduction in residual fragments, and a 36% reduction in total procedure time compared to the 0.2 J/50 Hz setting for COM stones. Thermal injury risk assessment indicated that 10 W power settings with high EP /low F combinations remained below the threshold for tissue injury, while higher power settings (>10 W) consistently exceeded the safety threshold. CONCLUSIONS Our findings suggest that high EP /low F settings, such as 0.8 J/12 Hz, are optimal for TFL lithotripsy in the treatment of COM stones. These settings demonstrated significantly improved treatment efficiency with reduced residual fragments compared to conventional settings while keeping the thermal dose below the injury threshold. This study highlights the importance of using the high EP /low F combination with low power settings, which maximizes treatment efficiency and minimizes potential thermal injury. Further studies are warranted to determine the optimal settings for TFL for treating kidney stones with different compositions.
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Affiliation(s)
- Arpit Mishra
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Robert Medairos
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Junqin Chen
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Francois Soto-Palou
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Jodi Antonelli
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Glenn M. Preminger
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Michael E. Lipkin
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Pei Zhong
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
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Ren JW, Xu J, Huang X, Xu M, Chen MY, Wang Y, Wang W, Zhong P. [Analysis of the influencing factors of short-term and long-term facial nerve function after vestibular schwannoma resection via suboccipital retrosigmoid approach]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2023; 58:1183-1190. [PMID: 38186092 DOI: 10.3760/cma.j.cn115330-20231015-00148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Abstract
Objective: To summarize the experience of facial nerve(FN) preservation in microsurgical treatment of vestibular schwannoma (VS) resection via suboccipital retrosigmoid approach and to analyze the influencing factors of facial function prognosis in short-term and long-term period. Methods: Patients with VS who underwent microsurgery via suboccipital retrosigmoid approach by the skull base surgery team in Huashan Hospital from January 2013 to February 2018 were enrolled. A total of 308 patients were included in this study, including 132 males and 176 females. The average age was 47.9 year-old (Range: 17-79 year-old). The patient's clinical data and FN function prognosis were recorded. Univariate and multivariate analysis by SPSS 23.0 statistical software were performed to evaluate the factors affecting facial function prognosis and its recovery. Results: Gross total resection was achieved in 304 cases, and subtotal resection was in 4 cases. The facial nerve preservation rate anatomically was 99.4%. The facial nerve of 2 cases was thin due to large tumor compression and severed, and a one-stage reconstruction was performed during surgery.Of the 308 patients, 300 cases were successfully followed up, and 8 cases were lost to follow-up. The mean follow-up time was 52 months. In short-term (2 weeks after surgery), satisfactory facial nerve function (House-Brackmann (H-B) grade Ⅰ-Ⅱ) was achieved in 96 cases, and 212 cases were unsatisfactory function (H-B grade Ⅲ-Ⅵ). After 1 year, 198 were satisfactory function and 97 were unsatisfactory. After 3 years, 219 were satisfactory function and 75 were unsatisfactory. Five years later, 155 were satisfactory function and 34 were unsatisfactory. According to the results of logistic regression analysis, the impact factors of FN function in short-term were tumor size (P=0.011) and stimulation threshold (ST) of EMG monitoring (P<0.001). The impact factors in long-term were tumor size (P=0.005), ST of EMG monitoring (P=0.005) and FN rehabilitation training. Conclusions: Tumor diameter is an independent factor related to FN function, and the larger the tumor, the worse the postoperative FN function. The ST of EMG (ST≤0.05 mA) can predict short-term and long-term FN function. The systematic facial rehabilitation training can effectively promote the recovery of FN after surgery.
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Affiliation(s)
- J W Ren
- Department of Neurosurgery, Fudan University Huashan Hospital, National Center for Neurological Disorders, Shanghai Key Lab. of Brain Function and Regeneration, Neurosurgical Institute, Shanghai Medical College-Fudan University, Shanghai 200040, China
| | - J Xu
- Department of Neurosurgery, Fudan University Huashan Hospital, National Center for Neurological Disorders, Shanghai Key Lab. of Brain Function and Regeneration, Neurosurgical Institute, Shanghai Medical College-Fudan University, Shanghai 200040, China
| | - X Huang
- Department of Neurosurgery, Fudan University Huashan Hospital, National Center for Neurological Disorders, Shanghai Key Lab. of Brain Function and Regeneration, Neurosurgical Institute, Shanghai Medical College-Fudan University, Shanghai 200040, China
| | - M Xu
- Department of Neurosurgery, Fudan University Huashan Hospital, National Center for Neurological Disorders, Shanghai Key Lab. of Brain Function and Regeneration, Neurosurgical Institute, Shanghai Medical College-Fudan University, Shanghai 200040, China
| | - M Y Chen
- Department of Neurosurgery, Fudan University Huashan Hospital, National Center for Neurological Disorders, Shanghai Key Lab. of Brain Function and Regeneration, Neurosurgical Institute, Shanghai Medical College-Fudan University, Shanghai 200040, China
| | - Y Wang
- Department of Neurosurgery, Fudan University Huashan Hospital, National Center for Neurological Disorders, Shanghai Key Lab. of Brain Function and Regeneration, Neurosurgical Institute, Shanghai Medical College-Fudan University, Shanghai 200040, China
| | - W Wang
- Department of Plastic and Reconstructive Surgery, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200011, China
| | - P Zhong
- Department of Neurosurgery, Fudan University Huashan Hospital, National Center for Neurological Disorders, Shanghai Key Lab. of Brain Function and Regeneration, Neurosurgical Institute, Shanghai Medical College-Fudan University, Shanghai 200040, China
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Xiang G, Chen J, Ho D, Sankin G, Zhao X, Liu Y, Wang K, Dolbow J, Yao J, Zhong P. Shock waves generated by toroidal bubble collapse are imperative for kidney stone dusting during Holmium:YAG laser lithotripsy. Ultrason Sonochem 2023; 101:106649. [PMID: 37866136 PMCID: PMC10623368 DOI: 10.1016/j.ultsonch.2023.106649] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Revised: 10/09/2023] [Accepted: 10/12/2023] [Indexed: 10/24/2023]
Abstract
Holmium:yttrium-aluminum-garnet (Ho:YAG) laser lithotripsy (LL) has been the treatment of choice for kidney stone disease for more than two decades, yet the mechanisms of action are not completely clear. Besides photothermal ablation, recent evidence suggests that cavitation bubble collapse is pivotal in kidney stone dusting when the Ho:YAG laser operates at low pulse energy (Ep) and high frequency (F). In this work, we perform a comprehensive series of experiments and model-based simulations to dissect the complex physical processes in LL. Under clinically relevant dusting settings (Ep = 0.2 J, F = 20 Hz), our results suggest that majority of the irradiated laser energy (>90 %) is dissipated by heat generation in the fluid surrounding the fiber tip and the irradiated stone surface, while only about 1 % may be consumed for photothermal ablation, and less than 0.7 % is converted into the potential energy at the maximum bubble expansion. We reveal that photothermal ablation is confined locally to the laser irradiation spot, whereas cavitation erosion is most pronounced at a fiber tip-stone surface distance about 0.5 mm where multi foci ring-like damage outside the thermal ablation zone is observed. The cavitation erosion is caused by the progressively intensified collapse of jet-induced toroidal bubble near the stone surface (<100 μm), as a result of Raleigh-Taylor and Richtmyer-Meshkov instabilities. The ensuing shock wave-stone interaction and resultant leaky Rayleigh waves on the stone surface may lead to dynamic fatigue and superficial material removal under repeated bombardments of toroidal bubble collapses during dusting procedures in LL.
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Affiliation(s)
- Gaoming Xiang
- Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA; Current address: Optics and Thermal Radiation Research Center, Institute of Frontier and Interdisciplinary Science, Shandong University, Qingdao 266237, China
| | - Junqin Chen
- Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Derek Ho
- Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Georgy Sankin
- Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Xuning Zhao
- Dept. of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - Yangyuanchen Liu
- Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Kevin Wang
- Dept. of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
| | - John Dolbow
- Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Junjie Yao
- Dept. of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Pei Zhong
- Thomas Lord Dept. of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA.
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Chen J, Mishra A, Medairos R, Antonelli J, Preminger GM, Lipkin ME, Zhong P. In vitro investigation of stone ablation efficiency, char formation, spark generation, and damage mechanism produced by thulium fiber laser. Urolithiasis 2023; 51:124. [PMID: 37917225 PMCID: PMC10880548 DOI: 10.1007/s00240-023-01501-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2023] [Accepted: 10/25/2023] [Indexed: 11/04/2023]
Abstract
To investigate stone ablation characteristics of thulium fiber laser (TFL), BegoStone phantoms were spot-treated in water at various fiber tip-to-stone standoff distances (SDs, 0.5 ~ 2 mm) over a broad range of pulse energy (Ep, 0.2 ~ 2 J), frequency (F, 5 ~ 150 Hz), and power (P, 10 ~ 30 W) settings. In general, the ablation speed (mm3/s) in BegoStone decreased with SD and increased with Ep, reaching a peak around 0.8 ~ 1.0 J. Additional experiments with calcium phosphate (CaP), uric acid (UA), and calcium oxalate monohydrate (COM) stones were conducted under two distinctly different settings: 0.2 J/100 Hz and 0.8 J/12 Hz. The concomitant bubble dynamics, spark generation and pressure transients were analyzed. Higher ablation speeds were consistently produced at 0.8 J/12 Hz than at 0.2 J/100 Hz, with CaP stones most difficult yet COM and UA stones easier to ablate. Charring was mostly observed in CaP stones at 0.2 J/100 Hz, accompanied by strong spark-generation, explosive combustion, and diminished pressure transients, but not at 0.8 J/12 Hz. By treating stones in parallel fiber orientation and leveraging the proximity effect of a ureteroscope, the contribution of bubble collapse to stone ablation was found to be substantial (16% ~ 59%) at 0.8 J/12 Hz, but not at 0.2 J/100 Hz. Overall, TFL ablation efficiency is significantly better at high Ep/low F setting, attributable to increased cavitation damage with less char formation.
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Affiliation(s)
- Junqin Chen
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Box 90300, Durham, NC, 27708, USA
| | - Arpit Mishra
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Box 90300, Durham, NC, 27708, USA
| | - Robert Medairos
- Department of Urology, Duke University Medical Center, Durham, NC, USA
| | - Jodi Antonelli
- Department of Urology, Duke University Medical Center, Durham, NC, USA
| | - Glenn M Preminger
- Department of Urology, Duke University Medical Center, Durham, NC, USA
| | - Michael E Lipkin
- Department of Urology, Duke University Medical Center, Durham, NC, USA
| | - Pei Zhong
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Box 90300, Durham, NC, 27708, USA.
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Osada T, Jiang X, Zhao Y, Chen M, Kreager BC, Wu H, Kim H, Ren J, Snyder J, Zhong P, Morse MA, Lyerly HK. The use of histotripsy as intratumoral immunotherapy beyond tissue ablation-the rationale for exploring the immune effects of histotripsy. Int J Hyperthermia 2023; 40:2263672. [PMID: 37806666 DOI: 10.1080/02656736.2023.2263672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 09/20/2023] [Indexed: 10/10/2023] Open
Abstract
Mechanical high-intensity focused ultrasound (M-HIFU), which includes histotripsy, is a non-ionizing, non-thermal ablation technology that can be delivered by noninvasive methods. Because acoustic cavitation is the primary mechanism of tissue disruption, histotripsy is distinct from the conventional HIFU techniques resulting in hyperthermia and thermal injury. Phase I human trials have shown the initial safety and efficacy of histotripsy in treating patients with malignant liver tumors. In addition to tissue ablation, a promising benefit of M-HIFU has been stimulating a local and systemic antitumor immune response in preclinical models and potentially in the Phase I trial. Preclinical studies combining systemic immune therapies appear promising, but clinical studies of combinations have been complicated by systemic toxicities. Consequently, combining M-HIFU with systemic immunotherapy has been demonstrated in preclinical models and may be testing in future clinical studies. An additional alternative is to combine intratumoral M-HIFU and immunotherapy using microcatheter-placed devices to deliver both M-HIFU and immunotherapy intratumorally. The promise of M-HIFU as a component of anti-cancer therapy is promising, but as forms of HIFU are tested in preclinical and clinical studies, investigators should report not only the parameters of the energy delivered but also details of the preclinical models to enable analysis of the immune responses. Ultimately, as clinical trials continue, clinical responses and immune analysis of patients undergoing M-HIFU including forms of histotripsy will provide opportunities to optimize clinical responses and to optimize application and scheduling of M-HIFU in the context of the multi-modality care of the cancer patient.
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Affiliation(s)
- Takuya Osada
- Department of Surgery, Duke University School of Medicine, Duke University, Durham, NC, USA
| | - Xiaoning Jiang
- Department of Mechanical and Aerospace Engineering, College of Engineering, NC State University, Raleigh, NC, USA
| | | | - Mengyue Chen
- Department of Mechanical and Aerospace Engineering, College of Engineering, NC State University, Raleigh, NC, USA
| | - Benjamin C Kreager
- Department of Mechanical and Aerospace Engineering, College of Engineering, NC State University, Raleigh, NC, USA
| | - Huaiyu Wu
- Department of Mechanical and Aerospace Engineering, College of Engineering, NC State University, Raleigh, NC, USA
| | - Howuk Kim
- Department of Mechanical Engineering, School of Engineering, Inha University, Incheon, Republic of South Korea
| | - Jun Ren
- Department of Surgery, Duke University School of Medicine, Duke University, Durham, NC, USA
| | - Joshua Snyder
- Department of Surgery and Cell Biology, Duke University School of Medicine, Duke University, Durham, NC, USA
| | - Pei Zhong
- Thomas Lord Department of Mechanical Engineering and Material Science, Pratt School of Engineering, Duke University, Durham, NC, USA
| | - Michael A Morse
- Department of Medicine, Duke University School of Medicine, Duke University, Durham, NC, USA
| | - H Kim Lyerly
- Department of Surgery, Pathology, and Integrative Immunobiology, Duke University School of Medicine, Duke University, Durham, NC, USA
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Soto-Palou F, Chen J, Medairos R, Zhong P, Antonelli J, Preminger GM, Lipkin ME. In Pursuit of the Optimal Dusting Settings with the Thulium Fiber Laser: An In Vitro Assessment. J Endourol 2023; 37:914-920. [PMID: 37300481 PMCID: PMC10494908 DOI: 10.1089/end.2023.0168] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023] Open
Abstract
Objective: Low energy and high frequency settings are used in stone dusting for holmium lasers. Such settings may not be optimal for thulium fiber laser (TFL). With the seemingly endless combination of settings, we aim to provide guidance to the practicing urologists and assess the efficiency of the TFL platform in an automated in vitro "dusting model." Materials/Methods: Three experimental setups were designed to investigate stone dusting produced by an IPG Photonics TLR-50 W TFL system using 200 μm fiber and soft BegoStone phantoms. The most popular 10 and 20 W dusting settings among endourologist familiar with TFL were evaluated. We directly compared short pulse (SP) vs long pulse (LP) mode using various combinations of pulse energy (Ep) and pulse frequency (F). Thereafter, we tested the 10 and 20 W settings and compared them among each other to elucidate the most efficient settings at each power. Treatments were performed under the same total laser energy delivered to the stone at four different standoff distances (SDs) with a clinically relevant scanning speed of either 1 or 2 mm/sec. Ablation volumes were quantified by optical coherence tomography to assess stone dusting efficiency. Fragment size after ablation at different pulse energies was evaluated by sieving and evaluating under a microscope after treatment. Results: Overall, SP provided greater ablation volume when compared with LP. Our dusting efficiency model demonstrated that the maximum stone ablation was achieved at the combination of high energy/low frequency settings (p < 0.005) and at a SD of 0.2 mm. At all tested pulse energies, no stone phantoms were broken into fragments >1 mm. Conclusions: During stone dusting with TFL, SP offers superior ablation to LP settings. Optimal dusting at clinically relevant scanning speeds of 1 and 2 mm/sec occurs at high energy/low frequency settings. Thulium lithotripsy with high Ep does not result in increased fragment size.
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Affiliation(s)
- Francois Soto-Palou
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Junqin Chen
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Robert Medairos
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Jodi Antonelli
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Glenn M. Preminger
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Michael E. Lipkin
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
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Tran S, Chen J, Kozel G, Chang E, Phung T, Peng Y, Dionise Z, Wu Y, Simmons WN, Lipkin ME, Preminger GM, Zhong P. Development of an optically transparent kidney model for laser lithotripsy research. BJU Int 2023; 132:36-39. [PMID: 36987835 PMCID: PMC10761083 DOI: 10.1111/bju.16015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Affiliation(s)
- Sabrina Tran
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Junqin Chen
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Gunnar Kozel
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Eric Chang
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Trina Phung
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Yanxi Peng
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Zachary Dionise
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Yuan Wu
- Department of Biostatistics and Bioinformatics, Duke University Medical Center, Durham, North Carolina
| | - W. Neal Simmons
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
| | - Michael E. Lipkin
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Glenn M. Preminger
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina
| | - Pei Zhong
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
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Liu Y, Claus S, Kerfriden P, Chen J, Zhong P, Dolbow JE. Model-based simulations of pulsed laser ablation using an embedded finite element method. Int J Heat Mass Transf 2023; 204:123843. [PMID: 36909718 PMCID: PMC10004101 DOI: 10.1016/j.ijheatmasstransfer.2022.123843] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
A model of thermal ablation with application to multi-pulsed laser lithotripsy is presented. The approach is based on a one-sided Stefan-Signorini model for thermal ablation, and relies on a level-set function to represent the moving interface between the solid phase and a fictitious gas phase (representing the ablated material). The model is discretized with an embedded finite element method, wherein the interface geometry can be arbitrarily located relative to the background mesh. Nitsche's method is adopted to impose the Signorini condition on the moving interface. A bound constraint is also imposed to deal with thermal shocks that can arise during representative simulations of pulsed ablation with high-power lasers. We report simulation results based on experiments for pulsed laser ablation of wet BegoStone samples treated in air, where Begostone has been used as a phantom material for kidney stone. The model is calibrated against experimental measurements by adjusting the percentage of incoming laser energy absorbed at the surface of the stone sample. Simulation results are then validated against experimental observations for the crater area, volume, and geometry as a function of laser pulse energy and duration. Our studies illustrate how the spreading of the laser beam from the laser fiber tip with concomitantly reduced incident laser irradiance on the damaged crater surface explains trends in both the experimental observations and the model-based simulation results.
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Affiliation(s)
- Yangyuanchen Liu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
| | - Susanne Claus
- ONERA, Université Paris-Saclay, Applied Mathematics and Scientific Computing Group, 8 Chemin de la Hunière, Palaiseau 91120, France
| | - Pierre Kerfriden
- Mines Paris, PSL University, Centre des Matériaux, CNRS UMR 7633, BP 87, Evry 91003, France
| | - Junqin Chen
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
| | - John E. Dolbow
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
- Corresponding author. (J.E. Dolbow)
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Hsiao MY, Liao D, Xiang G, Zhong P. Intercellular Calcium Waves and Permeability Change Induced by Vertically Deployed Surface Acoustic Waves in a Human Cerebral Microvascular Endothelial Cell Line (hCMEC/D3) Monolayer. Ultrasound Med Biol 2023; 49:1153-1163. [PMID: 36764884 PMCID: PMC10050144 DOI: 10.1016/j.ultrasmedbio.2022.12.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 11/28/2022] [Accepted: 12/29/2022] [Indexed: 05/11/2023]
Abstract
OBJECTIVE The ultrasound-mediated blood-brain barrier (BBB) opening with microbubbles has been widely employed, while recent studies also indicate the possibility that ultrasound alone can open the BBB through a direct mechanical effect. However, the exact mechanisms through which ultrasound interacts with the BBB and whether it can directly trigger intracellular signaling and a permeability change in the BBB endothelium remain unclear. METHODS Vertically deployed surface acoustic waves (VD-SAWs) were applied on a human cerebral microvascular endothelial cell line (hCMEC/D3) monolayer using a 33-MHz interdigital transducer that exerts shear stress-predominant stimulation. The intracellular calcium response was measured by fluorescence imaging, and the permeability of the hCMEC/D3 monolayer was assessed by transendothelial electrical resistance (TEER). DISCUSSION At a certain intensity threshold, VD-SAWs induced an intracellular calcium surge that propagated to adjacent cells as intercellular calcium waves. VD-SAWs induced a TEER decrease in a pulse repetition frequency-dependent manner, thereby suggesting possible involvement of the mechanosensitive ion channels. CONCLUSION The unique VD-SAW system enables more physiological mechanical stimulation of the endothelium monolayer. Moreover, it can be easily combined with other measurement devices, providing a useful platform for further mechanistic studies on ultrasound-mediated BBB opening.
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Affiliation(s)
- Ming-Yen Hsiao
- Department of Physical Medicine and Rehabilitation, College of Medicine, National Taiwan University, Taipei, Taiwan; Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan.
| | - Defei Liao
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
| | - Gaoming Xiang
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
| | - Pei Zhong
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, USA
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12
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Xiao BJ, Zhuang JH, Zhong P, Bi Y. [Characteristics of autonomic neuropathy in patients with vestibular migraine]. Zhonghua Yi Xue Za Zhi 2023; 103:671-676. [PMID: 36858367 DOI: 10.3760/cma.j.cn112137-20220726-01633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Objective: To investigate the characteristics of autonomic neuropathy in patients with vestibular migraine (VM) by sympathetic skin reflex (SSR) and R-R interval variation (RRIV). Methods: Seventy-three patients with interseizure VM and 36 healthy controls in the Department of Neurology affiliated to Shanghai Fourth People's Hospital of Tongji University from November 1, 2019 to December 31, 2021 were prospectively enrolled. SSR and RRIV were performed and relevant parameters were recorded, including SSR latency, SSR amplitude, RRIV during calm breathing (R%), RRIV during deep breathing (D%), RRIV difference between deep breathing and calm breathing (D%-R%), RRIV ratio between deep breathing and calm breathing (D%/R%), and the difference and correlation of various parameters between VM patients and healthy controls were analyzed. Results: Among the 73 patients with VM, there were 12 males and 61 females, and aged (46±13) years. While among 36 healthy controls, there were 6 males and 30 females, and aged (46±7) years. Among the 73 VM patients, abnormal SSR, abnormal RRIV, abnormal SSR and RRIV, and abnormal SSR or RRIV was detected in 38 cases (52%), 17 cases (23%), 11 cases (15%) and 44 cases (60%), respectively. Compared with healthy controls, the lower extremity SSR latency [(1 719±289) ms] in VM patients was longer than that in control group [(1 500±349) ms] (P=0.001), but the upper extremity SSR amplitude [1.6 (0.8, 3.0) mV] was lower than that in control group [2.6 (1.8, 4.2) mV] (P=0.006). SSR amplitude, R% and D% were negatively correlated with age in VM patients (rs=-0.311, P=0.007; rs=-0.237, P=0.043; rs=-0.263, P=0.024, respectively). SSR of lower extremity in VM patients was longer than that of upper extremity [(1 719±289) ms vs (1 244±185) ms, P<0.001], but the amplitude of lower extremity was lower than that of upper extremity [0.8 (0.3, 1.7) mV vs 1.6 (0.8, 3.0) mV, P<0.001]. SSR latency of upper limb was positively correlated with SSR latency of lower limb (r=0.436, P<0.001), the amplitude of upper limb was positively correlated with amplitude of lower limb (rs=0.456, P<0.001), and D% was positively correlated with R% (rs=0.357, P=0.002). Conclusion: The autonomic neuropathy during VM interphase features with imbalance between sympathetic and parasympathetic nervous system, and the sympathetic nerve function is mainly impaired.
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Affiliation(s)
- B J Xiao
- Department of Neurology, Shanghai Fourth People's Hospital affiliated to Tongji University, Shanghai 200434, China Department of Neurology, Shanghai TCM-Integrated Hospital Affiliated to Shanghai University of TCM, Shanghai 200082, China
| | - J H Zhuang
- Department of Neurology, the Second Affiliated Hospital of Naval Military Medical University (Shanghai Changzheng Hospital), Shanghai 200003, China
| | - P Zhong
- Department of Neurology, Shanghai TCM-Integrated Hospital Affiliated to Shanghai University of TCM, Shanghai 200082, China
| | - Y Bi
- Department of Neurology, Shanghai Fourth People's Hospital affiliated to Tongji University, Shanghai 200434, China
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Xiang G, Li D, Chen J, Mishra A, Sankin G, Zhao X, Tang Y, Wang K, Yao J, Zhong P. Dissimilar cavitation dynamics and damage patterns produced by parallel fiber alignment to the stone surface in holmium:yttrium aluminum garnet laser lithotripsy. Phys Fluids (1994) 2023; 35:033303. [PMID: 36896246 PMCID: PMC9986958 DOI: 10.1063/5.0139741] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Recent studies indicate that cavitation may play a vital role in laser lithotripsy. However, the underlying bubble dynamics and associated damage mechanisms are largely unknown. In this study, we use ultra-high-speed shadowgraph imaging, hydrophone measurements, three-dimensional passive cavitation mapping (3D-PCM), and phantom test to investigate the transient dynamics of vapor bubbles induced by a holmium:yttrium aluminum garnet laser and their correlation with solid damage. We vary the standoff distance (SD) between the fiber tip and solid boundary under parallel fiber alignment and observe several distinctive features in bubble dynamics. First, long pulsed laser irradiation and solid boundary interaction create an elongated "pear-shaped" bubble that collapses asymmetrically and forms multiple jets in sequence. Second, unlike nanosecond laser-induced cavitation bubbles, jet impact on solid boundary generates negligible pressure transients and causes no direct damage. A non-circular toroidal bubble forms, particularly following the primary and secondary bubble collapses at SD = 1.0 and 3.0 mm, respectively. We observe three intensified bubble collapses with strong shock wave emissions: the intensified bubble collapse by shock wave, the ensuing reflected shock wave from the solid boundary, and self-intensified collapse of an inverted "triangle-shaped" or "horseshoe-shaped" bubble. Third, high-speed shadowgraph imaging and 3D-PCM confirm that the shock origins from the distinctive bubble collapse form either two discrete spots or a "smiling-face" shape. The spatial collapse pattern is consistent with the similar BegoStone surface damage, suggesting that the shockwave emissions during the intensified asymmetric collapse of the pear-shaped bubble are decisive for the solid damage.
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Affiliation(s)
- Gaoming Xiang
- Thomas Lord Department of Mechanical and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Daiwei Li
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Junqin Chen
- Thomas Lord Department of Mechanical and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Arpit Mishra
- Thomas Lord Department of Mechanical and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Georgy Sankin
- Thomas Lord Department of Mechanical and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Xuning Zhao
- Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Yuqi Tang
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Kevin Wang
- Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Junjie Yao
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Pei Zhong
- Thomas Lord Department of Mechanical and Materials Science, Duke University, Durham, North Carolina 27708, USA
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14
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Zhang Y, Zhong P, Wang L, Zhang Y, Li N, Li Y, Jin Y, Bibi A, Huang Y, Xu Y. Development and validation of a clinical risk score to predict the occurrence of critical illness in hospitalized patients with SFTS. J Infect Public Health 2023; 16:393-398. [PMID: 36706468 DOI: 10.1016/j.jiph.2023.01.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2022] [Revised: 12/16/2022] [Accepted: 01/11/2023] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease with high mortality. Early identification of patients who may advance to critical stages is crucial. This investigation aimed to establish models to predict SFTS before it reaches the critical illness stage. METHODS Between January 2016 and September 2022, 278 cases have been included in this study. There were 87 demographic and systemic chosen variables. For selecting the predictive variables from the cohort, the LASSO was utilized, and for identifying independent predictors, multivariate logistic regression was performed. Based on these factors, a nomogram was established for critical illness. Concordance index values, decision curve analysis and the area under the curve (AUC) were also examined. RESULTS Multivariate logistic regression demonstrated the most important differentiating factors as;> 65 years old (P < 0.001, OR 3.388, 95 % CI 1.767-6.696), elevated serum PT (P = 0.011, OR 6.641, 95 % CI 1.584-31.934), elevated serum TT (P = 0.005, OR 3.384, 95 % CI 1.503-8.491), and elevated serum bicarbonate (P = 0.014, OR 0.242, 95 % CI 0.070-0.707). The C-index of the nomogram was 0.812 (95 % CI: 0.754-0.869), representing good discrimination. The model also showed excellent calibration. The AUC of the nomogram established based on four factors, as mentioned earlier, was 0.806. Furthermore, the model had the excellent net benefit, as revealed by the decision curve analysis. CONCLUSION An accurate risk score system built on manifestations noted in patients with SFTS upon admission to hospital, might be advantageous in managing SFTS.
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Affiliation(s)
- Yin Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Department of Pathogen Biology and Provincial Laboratories of Pathogen Biology and Zoonoses, Anhui Medical University, No. 81 Meishan Rd, Hefei, China
| | - Pei Zhong
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Department of Pathogen Biology and Provincial Laboratories of Pathogen Biology and Zoonoses, Anhui Medical University, No. 81 Meishan Rd, Hefei, China
| | - Lianzi Wang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Department of Pathogen Biology and Provincial Laboratories of Pathogen Biology and Zoonoses, Anhui Medical University, No. 81 Meishan Rd, Hefei, China
| | - Yu Zhang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Nan Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yaoyao Li
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Yangyang Jin
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China
| | - Asma Bibi
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Department of Pathogen Biology and Provincial Laboratories of Pathogen Biology and Zoonoses, Anhui Medical University, No. 81 Meishan Rd, Hefei, China
| | - Ying Huang
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China.
| | - Yuanhong Xu
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China; Department of Pathogen Biology and Provincial Laboratories of Pathogen Biology and Zoonoses, Anhui Medical University, No. 81 Meishan Rd, Hefei, China.
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15
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Luo R, Zhong P, Li X, Cai J, Tao Y, Xiong B, Zheng H, Zhang Z, Tang L, Yao J, Li Y, Shi Y, Han X. High-throughput peptide arrays identify potential diagnostic autoantibody signatures in early-stage lung adenocarcinoma. Cancer Epidemiol Biomarkers Prev 2023; 32:726-738. [PMID: 36857775 DOI: 10.1158/1055-9965.epi-22-0948] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 11/11/2022] [Accepted: 02/27/2023] [Indexed: 03/03/2023] Open
Abstract
BACKGROUND Early diagnosis is critical to lung adenocarcinoma (LUAD) patients' survival but faces inadequacies in convenient early detection. METHODS We applied a comprehensive microarray of 130,000 peptides to detect 'autoantibody signature' which is autoantibodies binding to mimotopes for early detection of stage 0-I LUAD. Plasma samples were collected from 147 early-stage LUAD (Early-LUAD), 108 benign lung disease (BLD), and 122 normal healthy controls (NHC). Clinical characteristics, low-dose computed tomography (LDCT), and laboratory tests were incorporated into correlation analysis. RESULTS We identified 143 and 133 autoantibody signatures, distinguishing Early-LUAD from NHC/BLD in the discovery cohort. Autoantibody signatures significantly correlated with age, stage, tumor size, Basophils count, and IgM level (P < 0.05). The random forest models based on differential autoantibody signatures displayed AUC of 0.92 and 0.87 to discern Early-LUAD from NHC/BLD in the validation cohort, respectively. Compared with LDCT, combining autoantibody signature and LDCT improved the positive predictive value from 50% to 78.33% (P = 0.049). Additionally, autoantibody signatures displayed higher sensitivity of 72.4%-81.0% compared to the combinational tumor markers (cyfra21.1, NSE, SCC, ProGRP) with a sensitivity of 22.4% (P = 0.000). Proteins matched by differential peptides were enriched in cancer-related PI3K/Akt, MAPK, and Wnt pathways. Overlaps between matched epitopes and autoantibody signatures illustrated the underlying engagement of autoantibodies in immune recognition. CONCLUSIONS Collectively, autoantibody signatures identified by a high-throughput peptide microarray have the potential to detect Early-LUAD, which could assist LDCT to better diagnose Early-LUAD. IMPACT Novel sensitive autoantibody signatures can adjuvant LDCT to better diagnose LUAD at very-early-stage.
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Affiliation(s)
- Rongrong Luo
- National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital,Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Pei Zhong
- iCarbonX (Zhuhai) Company Limited, Zhuhai, China, Shenzhen, China
| | - Xiying Li
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China., China
| | - Juan Cai
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China., China
| | - Yimin Tao
- Shenzhen Digital Life Institute, Shenzhen, China
| | - Bangzhu Xiong
- iCarbonX (Zhuhai) Company Limited, Zhuhai, China, China
| | | | - Zhishang Zhang
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Le Tang
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, Beijing, China., China
| | - Jiarui Yao
- Department of Medical Oncology, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yingrui Li
- National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing Key Laboratory of Clinical Study on Anticancer Molecular Targeted Drugs, Beijing, China., China
| | - Yuankai Shi
- Cancer Hospital of Chinese Academy of Medical Sciences, Beijing, China
| | - Xiaohong Han
- Clinical Pharmacology Research Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
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Xiang C, Yousheng X, Xiaolei Z, Wenjie Y, Jiali P, Zhong P. Editorial: Mitochondrial and lysosomal dysfunction in neurodegenerative diseases: Molecular mechanisms and therapeutic strategies. Front Aging Neurosci 2022; 14:1029440. [PMID: 36268190 PMCID: PMC9577456 DOI: 10.3389/fnagi.2022.1029440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 09/08/2022] [Indexed: 11/13/2022] Open
Affiliation(s)
- Chen Xiang
- Department of Neurology, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
- *Correspondence: Chen Xiang
| | - Xiao Yousheng
- Department of Neurology, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Zhu Xiaolei
- Department of Neurology, Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Yang Wenjie
- Department of Neurology, University of Maryland, Rockville, MD, United States
| | - Pu Jiali
- Department of Neurology, Second Affiliated Hospital of Zhejiang University, Hangzhou, China
| | - Pei Zhong
- Department of Diagnostic Radiology and Nuclear Medicine, The First Affiliated Hospital of Sun Yet-sen University, Guangzhou, China
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Xu Y, Zhong P, Hua J, Cai S, Yang YM, Ding Y. [A case report of neck congenital fibrosarcoma in newborns]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:998-999. [PMID: 36058669 DOI: 10.3760/cma.j.cn115330-20211103-00711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Y Xu
- Department of Otorhinolaryngology Head and Neck Surgery, Chengdu Women and Children's Central Hospital,Chengdu 6117311, China
| | - P Zhong
- Department of Pediatric Surgery, Chengdu Women and Children's Central Hospital,Chengdu 6117311, China
| | - J Hua
- Department of Pathology, Chengdu Women and Children's Central Hospital, Chengdu 6117311, China
| | - S Cai
- Department of Pathology, Chengdu Women and Children's Central Hospital, Chengdu 6117311, China
| | - Y M Yang
- Department of B-Ultrasound Room, Chengdu Women and Children's Central Hospital, Chengdu 6117311, China
| | - Yumei Ding
- Department of Radiology Department, Chengdu Women and Children's Central Hospital, Chengdu 6117311, China
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Zhang C, Hu A, Li J, Zhang F, Zhong P, Li Y, Li Y. Combined Non-Invasive Prediction and New Biomarkers of Oral and Fecal Microbiota in Patients With Gastric and Colorectal Cancer. Front Cell Infect Microbiol 2022; 12:830684. [PMID: 35663463 PMCID: PMC9161364 DOI: 10.3389/fcimb.2022.830684] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 04/13/2022] [Indexed: 11/13/2022] Open
Abstract
Background There is no information on the commonality and specificity of oral and fecal microbiota in patients with gastric cancer (GC) and colorectal cancer (CRC). Methods The high-throughput 16S rRNA gene V4 region sequencing was used to perform bioinformatics analysis of oral, fecal, and tissue microbiota in GC (76 subjects), CRC (53), and healthy controls (HC, 70). Furthermore, we determined the microbial characteristics of each part, constructed and verified three classifiers for GC and CRC, and evaluated curves of receiver operating characteristic and precision–recall with probability of disease. Results Compared to HC, the microbial richness and diversity of GC and CRC decreased in oral cavity and increased in stool; additionally, these indexes in GC tissue were higher than those in CRC tissue. In GC and CRC patients, Haemophilus, Neisseria, Faecalibacterium, and Romboutsia were significantly reduced compared to the relative abundance value of oral or fecal bacterial genera in the HC group, while the Streptococcus, Gemella, Escherichia-Shigella, and Fusobacterium were significantly increased. The oral and tissue microbiota have similar and abundant shared bacterial networks. The single and combined microbial detection have good AUC values based on POD indices for predicting GC, CRC, and gastrointestinal (GI) cancers (GC and CRC). Conclusion This study is the first to examine the characteristics of oral, fecal, and tumor microbiota in GC and CRC patients, and the similarities and differences in their microbial changes are reported. These oral or fecal bacteria (Haemophilus, Neisseria, Faecalibacterium, Romboutsia, Streptococcus, Gemella, Escherichia-Shigella, and Fusobacterium) may be involved in tumor evolution as potentially characteristic genera. In addition, both oral and fecal microbial detection may provide a solid theoretical foundation for the non-invasive prediction of these cancers.
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Affiliation(s)
- Chaoyang Zhang
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Asheng Hu
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Jingxing Li
- Department of Computer Science, Faculty of Science, University of Western Ontario, London, ON, Canada
| | - Fangfang Zhang
- Department of Anesthesiology, Hefei BOE Hospital, Hefei, China
| | - Pei Zhong
- Department of Clinical Laboratory, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yaxian Li
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China
| | - Yongxiang Li
- Department of General Surgery, The First Affiliated Hospital of Anhui Medical University, Hefei, China
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Zhong P, Lipkin ME, Preminger GM. Editorial Comment:Elucidating the Mechanism of Stone Dusting Requires a Fresh and Rigorous Approach in the New Era of Laser Lithotripsy. J Endourol 2022; 36:686-687. [PMID: 35369728 DOI: 10.1089/end.2022.0174] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Pei Zhong
- Thomas Lord Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Michael E Lipkin
- Division of Urology, Duke University Medical Center, Durham, North Carolina, USA
| | - Glenn M Preminger
- Division of Urology, Duke University Medical Center, Durham, North Carolina, USA
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Chen J, Ho DS, Xiang G, Sankin G, Preminger GM, Lipkin ME, Zhong P. Cavitation Plays a Vital Role in Stone Dusting During Short Pulse Holmium:YAG Laser Lithotripsy. J Endourol 2022; 36:674-683. [PMID: 34806899 PMCID: PMC9145256 DOI: 10.1089/end.2021.0526] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Objective: To investigate the mechanism of stone dusting in Holmium (Ho): YAG laser lithotripsy (LL). Materials and Methods: Cylindrical BegoStone samples (6 × 6 mm, H × D) were treated in water using a clinical Ho:YAG laser lithotripter in dusting mode (0.2-0.4 J with 70-78 μs in pulse duration, 20 Hz) at various fiber tip to stone standoff distances (SD = 0, 0.5, and 1 mm). Stone damage craters were quantified by optical coherence tomography and bubble dynamics were captured by high-speed video imaging. To differentiate the contribution of cavitation vs thermal ablation to stone damage, three additional experiments were performed. First, presoaked wet stones were treated in air to assess stone damage without cavitation. Second, the laser fiber was advanced at various offset distances (OSD = 0.25, 1, 2, 3, and 10 mm) from the tip of a flexible ureteroscope to alter the dynamics of bubble collapse. Third, stones were treated with parallel fiber to minimize photothermal damage while isolating the contribution of cavitation to stone damage. Results: Treatment in water resulted in 2.5- to 90-fold increase in stone damage compared with those produced in air where thermal ablation dominates. With the fiber tip placed at OSD = 0.25 mm, the collapse of the bubble was distracted away from the stone surface by the ureteroscope tip, leading to significantly reduced stone damage compared with treatment without the scope or with scope at large OSD of 3-10 mm. The average crater volume produced by parallel fiber orientation at 0.2 J after 100 pulses, where cavitation is the dominant mechanism of stone damage, was comparable with those produced by using perpendicular fiber orientation within SD = 0.25-1 mm. Conclusion: Cavitation plays a dominant role over photothermal ablation in stone dusting during short pulse Ho:YAG LL when 10 or more pulses are delivered to the same location.
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Affiliation(s)
- Junqin Chen
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Derek S. Ho
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Gaoming Xiang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Georgy Sankin
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Glenn M. Preminger
- Division of Urology, Duke University Medical Center, Durham, North Carolina, USA
| | - Michael E. Lipkin
- Division of Urology, Duke University Medical Center, Durham, North Carolina, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA.,Address correspondence to: Pei Zhong, PhD, Department of Mechanical Engineering and Materials Science, Duke University, Box 90300, Durham, NC 27708, USA
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21
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Ma J, Zhong P, Li Y, Sun Z, Sun X, Aung M, Hao L, Cheng Y, Zhu W. Hydrogenosome, Pairing Anaerobic Fungi and H2-Utilizing Microorganisms Based on Metabolic Ties to Facilitate Biomass Utilization. J Fungi (Basel) 2022; 8:jof8040338. [PMID: 35448569 PMCID: PMC9026988 DOI: 10.3390/jof8040338] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/21/2022] [Accepted: 03/22/2022] [Indexed: 02/04/2023] Open
Abstract
Anaerobic fungi, though low in abundance in rumen, play an important role in the degradation of forage for herbivores. When only anaerobic fungi exist in the fermentation system, the continuous accumulation of metabolites (e.g., hydrogen (H2) and formate) generated from their special metabolic organelles—the hydrogenosome—inhibits the enzymatic reactions in the hydrogenosome and reduces the activity of the anaerobic fungi. However, due to interspecific H2 transfer, H2 produced by the hydrogenosome can be used by other microorganisms to form valued bioproducts. This symbiotic interaction between anaerobic fungi and other microorganisms can be used to improve the nutritional value of animal feeds and produce value-added products that are normally in low concentrations in the fermentation system. Because of the important role in the generation and further utilization of H2, the study of the hydrogensome is increasingly becoming an important part of the development of anaerobic fungi as model organisms that can effectively improve the utilization value of roughage. Here, we summarize and discuss the classification and the process of biomass degradation of anaerobic fungi and the metabolism and function of anaerobic fungal hydrogensome, with a focus on the potential role of the hydrogensome in the efficient utilization of biomass.
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Affiliation(s)
- Jing Ma
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
| | - Pei Zhong
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
| | - Yuqi Li
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
| | - Zhanying Sun
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
| | - Xiaoni Sun
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
| | - Min Aung
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
- Department of Animal Nutrition, University of Veterinary Science, Nay Pyi Taw 15013, Myanmar
| | - Lizhuang Hao
- Key Laboratory of Plateau Grazing Animal Nutrition and Feed Science of Qinghai Province, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai Plateau Yak Research Center, Qinghai Academy of Science and Veterinary Medicine of Qinghai University, Xining 810016, China;
| | - Yanfen Cheng
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
- Correspondence: ; Tel.: +86-25-8439-5523
| | - Weiyun Zhu
- Laboratory of Gastrointestinal Microbiology, National Center for International Research on Animal Gut Nutrition, Nanjing Agricultural University, Nanjing 210095, China; (J.M.); (P.Z.); (Y.L.); (Z.S.); (X.S.); (M.A.); (W.Z.)
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22
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Wu Q, Qu M, Zhong P, Zeng Y, Wang J, Zhang Q, Wang T, Liu D, Yang L, Zhou J, Wang T. Anti-Inflammatory and Anti-Oxidant Activity of Ultra-Short Wave Diathermy on LPS-Induced Rat Lung Injury. Bull Exp Biol Med 2022; 172:423-429. [PMID: 35175488 PMCID: PMC8853088 DOI: 10.1007/s10517-022-05407-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Indexed: 11/24/2022]
Abstract
We studied the lung-protective effect and mechanisms of the anti-inflammatory and antioxidant effects of ultra-short-wave diathermy (USWD) in a rat model of LPS-induced acute lung injury. Histological examination of the lung tissues was performed and the levels of oxidative stress-related factors and inflammatory cytokines were measured. It was shown that the lung injury score, the lung wet-to-dry weight ratio (W/D), oxidative stress-related factors malondialdehyde and acyl-CoA synthetase long-chain family member 4 (ACSL4), and inflammatory cytokines were increased after LPS administration, while USWD treatment reduced these parameters. In addition, superoxide dismutase and glutathione peroxidase 4 were decreased in rats with LPS-induced acute lung injury, while USWD therapy up-regulated the expression of these enzymes. Thus, USWD could antagonize lung injury by inhibiting oxidative stress and inflammatory response in rats with acute lung injury. USWD can be a promising adjunctive treatment to counter oxidative stress and inflammation and a potential therapeutic candidate for the treatment of patients with this pathology.
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Affiliation(s)
- Q Wu
- The First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu, China.,The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - M Qu
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - P Zhong
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Y Zeng
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - J Wang
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Q Zhang
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Ting Wang
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - D Liu
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - L Yang
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - J Zhou
- The First Affiliated Hospital of University of South China, Department of Rehabilitation, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Tong Wang
- The First Affiliated Hospital with Nanjing Medical University, Nanjing, Jiangsu, China.
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23
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Abe S, Nagata H, Crosby EJ, Inoue Y, Kaneko K, Liu CX, Yang X, Wang T, Acharya CR, Agarwal P, Snyder J, Gwin W, Morse MA, Zhong P, Lyerly HK, Osada T. Combination of ultrasound-based mechanical disruption of tumor with immune checkpoint blockade modifies tumor microenvironment and augments systemic antitumor immunity. J Immunother Cancer 2022; 10:jitc-2021-003717. [PMID: 35039461 PMCID: PMC8765068 DOI: 10.1136/jitc-2021-003717] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/13/2021] [Indexed: 02/02/2023] Open
Abstract
Background Despite multimodal adjuvant management with radiotherapy, chemotherapy and hormonal therapies, most surgically resected primary breast cancers relapse or metastasize. A potential solution to late and distant recurrence is to augment systemic antitumor immunity, in part by appropriately presenting tumor antigens, but also by modulating the immunosuppressive tumor microenvironment (TME). We previously validated this concept in models of murine carcinoma treated with a novel predominately microcavitating version of high-intensity focused ultrasound (HIFU), mechanical high-intensity focused ultrasound (M-HIFU). Here we elucidated the mechanisms of enhanced antitumor immunity by M-HIFU over conventional thermal high-intensity focused ultrasound (T-HIFU) and investigated the potential of the combinatorial strategy with an immune checkpoint inhibitor, anti-PD-L1 antibody. Methods The antitumor efficacy of treatments was investigated in syngeneic murine breast cancer models using triple-negative (E0771) or human ErbB-2 (HER2) expressing (MM3MG-HER2) tumors in C57BL/6 or BALB/c mice, respectively. Induction of systemic antitumor immunity by the treatments was tested using bilateral tumor implantation models. Flow cytometry, immunohistochemistry, and single-cell RNA sequencing were performed to elucidate detailed effects of HIFU treatments or combination treatment on TME, including the activation status of CD8 T cells and polarization of tumor-associated macrophages (TAMs). Results More potent systemic antitumor immunity and tumor growth suppression were induced by M-HIFU compared with T-HIFU. Molecular characterization of the TME after M-HIFU by single-cell RNA sequencing demonstrated repolarization of TAM to the immunostimulatory M1 subtype compared with TME post-T-HIFU. Concurrent anti-PD-L1 antibody administration or depletion of CD4+ T cells containing a population of regulatory T cells markedly increased T cell-mediated antitumor immunity and tumor growth suppression at distant, untreated tumor sites in M-HIFU treated mice compared with M-HIFU monotherapy. CD8 T and natural killer cells played major roles as effector cells in the combination treatment. Conclusions Physical disruption of the TME by M-HIFU repolarizes TAM, enhances T-cell infiltration, and, when combined with anti-PD-L1 antibody, mediates superior systemic antitumor immune responses and distant tumor growth suppression. These findings suggest M-HIFU combined with anti-PD-L1 may be useful in reducing late recurrence or metastasis when applied to primary tumors.
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Affiliation(s)
- Shinya Abe
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA.,Department of Surgical Oncology, Faculty of Medicine, The University of Tokyo Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Hiroshi Nagata
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA.,Department of Surgical Oncology, Faculty of Medicine, The University of Tokyo Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Erika J Crosby
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Yoshiyuki Inoue
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA.,Department of Surgery, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Kensuke Kaneko
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA.,Department of Surgical Oncology, Faculty of Medicine, The University of Tokyo Graduate School of Medicine, Bunkyo-ku, Tokyo, Japan
| | - Cong-Xiao Liu
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Xiao Yang
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Tao Wang
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Chaitanya R Acharya
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Pankaj Agarwal
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Joshua Snyder
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - William Gwin
- Department of Medicine, University of Washington, Seattle, Washington, USA
| | - Michael A Morse
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA.,Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Herbert Kim Lyerly
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Takuya Osada
- Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
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24
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Terry RS, Ho DS, Scialabba DM, Whelan PS, Qi R, Ketterman BT, Preminger GM, Zhong P, Lipkin ME. Comparison of Different Pulse Modulation Modes for Holmium:Yttrium-Aluminum-Garnet Laser Lithotripsy Ablation in a Benchtop Model. J Endourol 2022; 36:29-37. [PMID: 34269626 PMCID: PMC8785761 DOI: 10.1089/end.2021.0113] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Introduction: Manipulation of Holmium:Yttrium-Aluminum-Garnet laser parameters such as pulse energy (PE), frequency, and duration can impact laser lithotripsy ablation efficiency. In 2017, Lumenis introduced Moses™ Technology, which uses pulse modulation to enhance the delivery of energy from fiber to stone as well as to minimize stone retropulsion. Since the introduction of Moses Technology, other companies have brought additional pulse modulation concepts to market. The purpose of this in vitro study is to compare the pulse characteristics and stone ablation efficiency of Lumenis Moses Technology with Quanta's Vapor Tunnel™. Materials and Methods: Submerged BegoStone phantoms were systematically ablated using either the Lumenis Moses Pulse 120H or the Quanta Litho 100 clinical laser system. Two PEs (0.4 and 1 J), three fiber-stone standoff distances (SDs) (0.5, 1, 2 mm), and all available pulse duration and modulation modes for each laser were tested in combination. Fiber speed was adjusted to scan across the stone surface at either 1 or 10 pulses/mm to form single pulse craters or an ablation trough, respectively. Volumes of single craters and 1 mm trough segments were imaged and quantified using optical coherence tomography. Results: Ablation volumes decreased with decreasing PE and increasing SD. Statistically significant variability was seen between pulse types (PT) at every tested parameter set. Among pulse modulation modes, Moses Distance (MD) was superior at 0.5 mm in all testing and at 2 mm in trough testing. Vapor Tunnel (VT) was superior in 2 mm single crater testing. All modulated pulses performed similarly at 1 mm. Conclusions: In this benchtop model of laser lithotripsy, stone ablation was significantly impacted by PT. MD demonstrated superior or noninferior stone ablation at most tested parameters. VT maintained its efficacy the best as SD increased. Future work should focus on the mechanistic differences of these modes relative to other traditional laser pulse modes.
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Affiliation(s)
- Russell S. Terry
- Department of Urology, University of Florida College of Medicine, Gainesville, Florida, USA.,Address correspondence to: Russell S. Terry, MD, Department of Urology, University of Florida College of Medicine, 1600 SW Archer Road, Box 100247, Gainesville, FL 32610, USA
| | - Derek S. Ho
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Dominick M. Scialabba
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Patrick S. Whelan
- Division of Urologic Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Robert Qi
- Division of Urologic Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | | | - Glenn M. Preminger
- Division of Urologic Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Michael E. Lipkin
- Division of Urologic Surgery, Duke University Medical Center, Durham, North Carolina, USA
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25
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Xu D, Zhong P, Peng L, Bing X, Yan K, Gao J, Zhao P, Zhang L, Wang Y. Multiscale evaluation of the efficiently separation of phenols using a designed cationic functionalized ionic liquid based on Brønsted/Lewis coordination. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2021.117901] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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26
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Vu T, Tang Y, Li M, Sankin G, Tang S, Chen S, Zhong P, Yao J. Photoacoustic computed tomography of mechanical HIFU-induced vascular injury. Biomed Opt Express 2021; 12:5489-5498. [PMID: 34692196 PMCID: PMC8515986 DOI: 10.1364/boe.426660] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/14/2021] [Accepted: 06/17/2021] [Indexed: 06/13/2023]
Abstract
Mechanical high-intensity focused ultrasound (HIFU) has been used for cancer treatment and drug delivery. Existing monitoring methods for mechanical HIFU therapies such as MRI and ultrasound imaging often suffer from high cost, poor spatial-temporal resolution, and/or low sensitivity to tissue's hemodynamic changes. Evaluating vascular injury during mechanical HIFU treatment, therefore, remains challenging. Photoacoustic computed tomography (PACT) is a promising tool to meet this need. Intrinsically sensitive to optical absorption, PACT provides high-resolution imaging of blood vessels using hemoglobin as the endogenous contrast. In this study, we have developed an integrated HIFU-PACT system for detecting vascular rupture in mechanical HIFU treatment. We have demonstrated singular value decomposition for enhancing hemorrhage detection. We have validated the HIFU-PACT performance on phantoms and in vivo animal tumor models. We expect that PACT-HIFU will find practical applications in oncology research using small animal models.
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Affiliation(s)
- Tri Vu
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Yuqi Tang
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Mucong Li
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Georgii Sankin
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Shanshan Tang
- Department of Radiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Shigao Chen
- Department of Radiology, Mayo Clinic College of Medicine, Rochester, MN 55905, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Junjie Yao
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
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27
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Xiang G, Ma X, Liang C, Yu H, Liao D, Sankin G, Cao S, Wang K, Zhong P. Variations of stress field and stone fracture produced at different lateral locations in a shockwave lithotripter field. J Acoust Soc Am 2021; 150:1013. [PMID: 34470261 PMCID: PMC8357445 DOI: 10.1121/10.0005823] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
During clinical procedures, the lithotripter shock wave (LSW) that is incident on the stone and resultant stress field is often asymmetric due to the respiratory motion of the patient. The variations of the LSW-stone interaction and associated fracture pattern were investigated by photoelastic imaging, phantom experiments, and three-dimensional fluid-solid interaction modeling at different lateral locations in a lithotripter field. In contrast to a T-shaped fracture pattern often observed in the posterior region of the disk-shaped stone under symmetric loading, the fracture pattern gradually transitioned to a tilted L-shape under asymmetric loading conditions. Moreover, the model simulations revealed the generation of surface acoustic waves (SAWs), i.e., a leaky Rayleigh wave on the anterior boundary and Scholte wave on the posterior boundary of the stone. The propagation of SAWs on the stone boundary is accompanied by a progressive transition of the LSW reflection pattern from regular to von Neumann and to weak von Neumann reflection near the glancing incidence and, concomitantly, the development and growth of a Mach stem, swirling around the stone boundary. The maximum tensile stress and stress integral were produced by SAWs on the stone boundary under asymmetric loading conditions, which drove the initiation and extension of surface cracks into the bulk of the stone that is confirmed by micro-computed tomography analysis.
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Affiliation(s)
- Gaoming Xiang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Xiaojian Ma
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Cosima Liang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Hongyang Yu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Defei Liao
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Georgy Sankin
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Shunxiang Cao
- Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Kevin Wang
- Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
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28
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Li M, Gu J, Vu T, Sankin G, Zhong P, Yao J, Jing Y. Time-Resolved Passive Cavitation Mapping Using the Transient Angular Spectrum Approach. IEEE Trans Ultrason Ferroelectr Freq Control 2021; 68:2361-2369. [PMID: 33635787 PMCID: PMC8269954 DOI: 10.1109/tuffc.2021.3062357] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Passive cavitation mapping (PCM), which generates images using bubble acoustic emission signals, has been increasingly used for monitoring and guiding focused ultrasound surgery (FUS). PCM can be used as an adjunct to magnetic resonance imaging to provide crucial information on the safety and efficacy of FUS. The most widely used algorithm for PCM is delay-and-sum (DAS). One of the major limitations of DAS is its suboptimal computational efficiency. Although frequency-domain DAS can partially resolve this issue, such an algorithm is not suitable for imaging the evolution of bubble activity in real time and for cases in which cavitation events occur asynchronously. This study investigates a transient angular spectrum (AS) approach for PCM. The working principle of this approach is to backpropagate the received signal to the domain of interest and reconstruct the spatial-temporal wavefield encoded with the bubble location and collapse time. The transient AS approach is validated using an in silico model and water bath experiments. It is found that the transient AS approach yields similar results to DAS, but it is one order of magnitude faster. The results obtained by this study suggest that the transient AS approach is promising for fast and accurate PCM.
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29
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Li F, Park TH, Sankin G, Gilchrist C, Liao D, Chan CU, Mao Z, Hoffman BD, Zhong P. Mechanically induced integrin ligation mediates intracellular calcium signaling with single pulsating cavitation bubbles. Am J Cancer Res 2021; 11:6090-6104. [PMID: 33897901 PMCID: PMC8058710 DOI: 10.7150/thno.56813] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2020] [Accepted: 03/23/2021] [Indexed: 11/05/2022] Open
Abstract
Therapeutic ultrasound or shockwave has shown its great potential to stimulate neural and muscle tissue, where cavitation microbubble induced Ca2+ signaling is believed to play an important role. However, the pertinent mechanisms are unknown, especially at the single-cell level. Particularly, it is still a major challenge to get a comprehensive understanding of the effect of potential mechanosensitive molecular players on the cellular responses, including mechanosensitive ion channels, purinergic signaling and integrin ligation by extracellular matrix. Methods: Here, laser-induced cavitation microbubble was used to stimulate individual HEK293T cells either genetically knocked out or expressing Piezo1 ion channels with different normalized bubble-cell distance. Ca2+ signaling and potential membrane poration were evaluated with a real-time fluorescence imaging system. Integrin-binding microbeads were attached to the apical surface of the cells at mild cavitation conditions, where the effect of Piezo1, P2X receptors and integrin ligation on single cell intracellular Ca2+ signaling was assessed. Results: Ca2+ responses were rare at normalized cell-bubble distances that avoided membrane poration, even with overexpression of Piezo1, but could be increased in frequency to 42% of cells by attaching integrin-binding beads. We identified key molecular players in the bead-enhanced Ca2+ response: increased integrin ligation by substrate ECM triggered ATP release and activation of P2X-but not Piezo1-ion channels. The resultant Ca2+ influx caused dynamic changes in cell spread area. Conclusion: This approach to safely eliciting a Ca2+ response with cavitation microbubbles and the uncovered mechanism by which increased integrin-ligation mediates ATP release and Ca2+ signaling will inform new strategies to stimulate tissues with ultrasound and shockwaves.
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30
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Ho DS, Scialabba D, Terry RS, Ma X, Chen J, Sankin GN, Xiang G, Qi R, Preminger GM, Lipkin ME, Zhong P. The Role of Cavitation in Energy Delivery and Stone Damage During Laser Lithotripsy. J Endourol 2021; 35:860-870. [PMID: 33514285 DOI: 10.1089/end.2020.0349] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Purpose: Although cavitation during laser lithotripsy (LL) contributes to the Moses effect, the impact of cavitation on stone damage is less clear. Using different laser settings, we investigate the role of cavitation bubbles in energy delivery and stone damage. Materials and Methods: The role of cavitation in laser energy delivery was characterized by using photodetector measurements synced with high-speed imaging for laser pulses of varying durations. BegoStone samples were treated with the laser fiber oriented perpendicularly in contact with the stone in water or in air to assess the impact of cavitation on crater formation. Crater volume and geometry were quantified by using optical coherence tomography. Further, the role of cavitation in stone damage was elucidated by treatment in water with the fiber oriented parallel to the stone surface and by photoelastic imaging. Results: Longer pulse durations resulted in higher energy delivery but smaller craters. Stones treated in water resulted in greater volume, wider yet shallower craters compared with those treated in air. Stones treated with the parallel fiber showed crater formation after 15 pulses, confirmed by high-speed imaging of the bubble collapse with the resultant stress field captured by photoelastic imaging. Conclusions: Despite improved energy delivery, the longer pulse mode produced smaller crater volume, suggesting additional processes secondary to photothermal ablation are involved in stone damage. Our critical observations of the difference in stone damage treated in water vs in air, combined with the crater formation by parallel fiber, suggest that cavitation is a contributor to stone damage during LL.
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Affiliation(s)
- Derek S Ho
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Dominick Scialabba
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Russell S Terry
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Xiaojian Ma
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA.,Department of Research and Development, China Academy of Launch Vehicle Technology, Beijing, China
| | - Junqin Chen
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Georgy N Sankin
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Gaoming Xiang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
| | - Robert Qi
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Glenn M Preminger
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Michael E Lipkin
- Division of Urology, Department of Surgery, Duke University Medical Center, Durham, North Carolina, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
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Abstract
Shock wave lithotripsy (SWL) has been widely used for non-invasive treatment of kidney stones. Cavitation plays an important role in stone fragmentation, yet it may also contribute to renal injury during SWL. It is therefore crucial to determine the spatiotemporal distributions of cavitation activities to maximize stone fragmentation while minimizing tissue injury. Traditional cavitation detection methods include high-speed optical imaging, active cavitation mapping (ACM), and passive cavitation mapping (PCM). While each of the three methods provides unique information about the dynamics of the bubbles, PCM has most practical applications in biological tissues. To image the dynamics of cavitation bubble collapse, we previously developed a sliding-window PCM (SW-PCM) method to identify each bubble collapse with high temporal and spatial resolution. In this work, to further validate and optimize the SW-PCM method, we have developed tri-modality cavitation imaging that includes three-dimensional high-speed optical imaging, ACM, and PCM seamlessly integrated in a single system. Using the tri-modality system, we imaged and analyzed laser-induced single cavitation bubbles in both free field and constricted space and shock wave-induced cavitation clusters. Collectively, our results have demonstrated the high reliability and spatial-temporal accuracy of the SW-PCM approach, which paves the way for the future in vivo applications on large animals and humans in SWL.
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Affiliation(s)
- Mucong Li
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Georgy Sankin
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Tri Vu
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Junjie Yao
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
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Liao D, Hsiao MY, Xiang G, Zhong P. Optimal pulse length of insonification for Piezo1 activation and intracellular calcium response. Sci Rep 2021; 11:709. [PMID: 33436695 PMCID: PMC7804118 DOI: 10.1038/s41598-020-78553-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Accepted: 11/19/2020] [Indexed: 11/29/2022] Open
Abstract
Ultrasound (US) neuromodulation, especially sonogenetics, has been demonstrated with potential applications in noninvasive and targeted treatment of various neurological disorders. Despite the growing interest, the mechanism for US neuromodulation remains elusive, and the optimal condition for eliciting a neural response with minimal adverse effect has not been identified. Here, we investigate the Piezo1 activation and intracellular calcium response elicited by acoustical streaming induced shear stress under various US exposure conditions. We find that Piezo1 activation and resultant intracellular calcium response depend critically on shear stress amplitude and pulse length of the stimulation. Under the same insonification acoustic energy, we further identify an optical pulse length that leads to maximum cell deformation, Piezo1 activation, and calcium response with minimal injury, confirmed by numerical modeling of Piezo1 channel gating dynamics. Our results provide insight into the mechanism of ultrasonic activation of Piezo1 and highlight the importance of optimizing US exposure conditions in sonogenetics applications.
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Affiliation(s)
- Defei Liao
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Ming-Yen Hsiao
- Department of Physical Medicine & Rehabilitation, National Taiwan University College of Medicine, Taipei, Taiwan.,Department of Physical Medicine & Rehabilitation, National Taiwan University Hospital, Taipei, Taiwan
| | - Gaoming Xiang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.
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Li M, Vu T, Sankin G, Winship B, Boydston K, Terry R, Zhong P, Yao J. Internal-Illumination Photoacoustic Tomography Enhanced by a Graded-Scattering Fiber Diffuser. IEEE Trans Med Imaging 2021; 40:346-356. [PMID: 32986546 PMCID: PMC7772228 DOI: 10.1109/tmi.2020.3027199] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The penetration depth of photoacoustic imaging in biological tissues has been fundamentally limited by the strong optical attenuation when light is delivered externally through the tissue surface. To address this issue, we previously reported internal-illumination photoacoustic imaging using a customized radial-emission optical fiber diffuser, which, however, has complex fabrication, high cost, and non-uniform light emission. To overcome these shortcomings, we have developed a new type of low-cost fiber diffusers based on a graded-scattering method in which the optical scattering of the fiber diffuser is gradually increased as the light travels. The graded scattering can compensate for the optical attenuation and provide relatively uniform light emission along the diffuser. We performed Monte Carlo numerical simulations to optimize several key design parameters, including the number of scattering segments, scattering anisotropy factor, divergence angle of the optical fiber, and reflective index of the surrounding medium. These optimized parameters collectively result in uniform light emission along the fiber diffuser and can be flexibly adjusted to accommodate different applications. We fabricated and characterized the prototype fiber diffuser made of agarose gel and intralipid. Equipped with the new fiber diffuser, we performed thorough proof-of-concept studies on ex vivo tissue phantoms and an in vivo swine model to demonstrate the deep-imaging capability (~10 cm achieved ex vivo) of photoacoustic tomography. We believe that the internal light delivery via the optimized fiber diffuser is an effective strategy to image deep targets (e.g., kidney) in large animals or humans.
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Aubin F, Cervoni J, Alby-Lepresle B, Weil D, Zhong P, Wendling D, Toussirot E, Carbonnel F, Blondet R, Thévenot T, Monnet E, Cales P, Di Martino V. Évaluation non invasive de la fibrose hépatique chez des patients atteints de psoriasis, polyarthrite rhumatoïde ou maladie de Crohn traités par méthotrexate. Ann Dermatol Venereol 2020. [DOI: 10.1016/j.annder.2020.09.496] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Zhong P. Editorial Comment on: " In Vitro Evaluation of Urinary Stone Comminution with a Clinical Burst Wave Lithotripsy System" by Ramesh et al. J Endourol 2020; 34:1173-1174. [PMID: 32336158 DOI: 10.1089/end.2020.0358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina, USA
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36
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Ho* D, Scialabba D, Terry R, Qi R, Preminger G, Lipkin M, Zhong P. MP69-03 THE EFFECTS OF LASER PULSE DURATION ON ENERGY DELIVERY AND STONE DAMAGE DURING LASER LITHOTRIPSY. J Urol 2020. [DOI: 10.1097/ju.0000000000000949.03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Li M, Lan B, Sankin G, Zhou Y, Liu W, Xia J, Wang D, Trahey G, Zhong P, Yao J. Simultaneous Photoacoustic Imaging and Cavitation Mapping in Shockwave Lithotripsy. IEEE Trans Med Imaging 2020; 39:468-477. [PMID: 31329550 PMCID: PMC6960366 DOI: 10.1109/tmi.2019.2928740] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Kidney stone disease is a major health problem worldwide. Shockwave lithotripsy (SWL), which uses high-energy shockwave pulses to break up kidney stones, is extensively used in clinic. However, despite its noninvasiveness, SWL can produce cavitation in vivo. The rapid expansion and violent collapse of cavitation bubbles in small blood vessels may result in renal vascular injury. To better understand the mechanism of tissue injury and improve treatment safety and efficiency, it is highly desirable to concurrently detect cavitation and vascular injury during SWL. Current imaging modalities used in SWL ( e.g. , C-arm fluoroscopy and B-mode ultrasound) are not sensitive to vascular injuries. By contrast, photoacoustic imaging is a non-invasive and non-radiative imaging modality that is sensitive to blood, by using hemoglobin as the endogenous contrast. Moreover, photoacoustic imaging is also compatible with passive cavitation detection by sharing the ultrasound detection system. Here, we have integrated shockwave treatment, photoacoustic imaging, and passive cavitation detection into a single system. Our experimental results on phantoms and in vivo small animals have collectively demonstrated that the integrated system is capable of capturing shockwave-induced cavitation and the resultant vascular injury simultaneously. We expect that the integrated system, when combined with our recently developed internal-light-illumination photoacoustic imaging, will find important applications for monitoring shockwave-induced vascular injury in deep tissues during SWL.
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Affiliation(s)
- Mucong Li
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Bangxin Lan
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Georgii Sankin
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
| | - Yuan Zhou
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Wei Liu
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Jun Xia
- Department of Biomedical Engineering, University of Buffalo, Buffalo, NY 14260, USA
| | - Depeng Wang
- Department of Biomedical Engineering, University of Buffalo, Buffalo, NY 14260, USA
| | - Gregg Trahey
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, USA
- P. Zhong, , J. Yao,
| | - Junjie Yao
- Department of Biomedical Engineering, Duke University, Durham, NC 27708, USA
- P. Zhong, , J. Yao,
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Seo JS, Zhong P, Liu A, Yan Z, Greengard P. Correction: Elevation of p11 in lateral habenula mediates depression-like behavior. Mol Psychiatry 2020; 25:3451-3452. [PMID: 31636379 PMCID: PMC7962569 DOI: 10.1038/s41380-019-0538-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
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Affiliation(s)
- J-S. Seo
- grid.134907.80000 0001 2166 1519Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, NY USA
| | - P. Zhong
- grid.273335.30000 0004 1936 9887Department of Physiology and Biophysics, School of Medicine and Biomedical Sciences, State University of New York, Buffalo, NY USA
| | - A. Liu
- grid.273335.30000 0004 1936 9887Department of Physiology and Biophysics, School of Medicine and Biomedical Sciences, State University of New York, Buffalo, NY USA
| | - Z. Yan
- grid.273335.30000 0004 1936 9887Department of Physiology and Biophysics, School of Medicine and Biomedical Sciences, State University of New York, Buffalo, NY USA
| | - P. Greengard
- grid.134907.80000 0001 2166 1519Laboratory of Molecular and Cellular Neuroscience, The Rockefeller University, New York, NY USA
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Kim H, Wu H, Cho N, Zhong P, Mahmood K, Lyerly HK, Jiang X. Miniaturized Intracavitary Forward-Looking Ultrasound Transducer for Tissue Ablation. IEEE Trans Biomed Eng 2019; 67:2084-2093. [PMID: 31765299 DOI: 10.1109/tbme.2019.2954524] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE This paper aims to develop a miniaturized forward-looking ultrasound transducer for intracavitary tissue ablation, which can be used through an endoscopic device. The internal ultrasound (US) delivery is capable of directly interacting with the target tumor, resolving adverse issues of currently available US devices, such as unintended tissue damage and insufficient delivery of acoustic power. METHODS To transmit a high acoustic pressure from a small aperture (<3 mm), a double layer transducer (1.3 MHz) was designed and fabricated based on numerical simulations. The electric impedance and the acoustic pressure of the actual device was characterized with an impedance analyzer and a hydrophone. Ex vivo tissue ablation tests and temperature monitoring were then conducted with porcine livers. RESULTS The acoustic intensity of the transducer was 37.1 W/cm2 under 250 Vpp and 20% duty cycle. The tissue temperature was elevated to 51.8 °C with a 67 Hz pulse-repetition frequency. The temperature profile in the tissue indicated that ultrasound energy was effectively absorbed inside the tissue. During a 5-min sonification, an approximate tissue volume of 2.5 × 2.5 × 1.0 mm3 was ablated, resulting in an irreversible lesion. CONCLUSION This miniaturized US transducer is a promising medical option for the precise tissue ablation, which can reduce the risk of unintended tissue damage found in noninvasive US treatments. SIGNIFICANCE Having a small aperture (2 mm), the intracavitary device is capable of ablating a bio tissue in 5 min with a relatively low electric power (<17 W).
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40
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Zhang Y, Yang C, Qiang H, Zhong P. Nanosecond shock wave-induced surface acoustic waves and dynamic fracture at fluid-solid boundaries. Phys Rev Res 2019; 1:033068. [PMID: 32478333 PMCID: PMC7258530 DOI: 10.1103/physrevresearch.1.033068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We investigate the generation and propagation characteristics of leaky Rayleigh waves (LRWs) caused by a spherical shock wave incident on a water-glass boundary both experimentally and numerically. The maximum tensile stress produced on the solid boundary is attributed to the dynamic interaction between the LRWs and an evanescent wave generated concomitantly along the boundary. The resultant tensile stress field drives the initiation of crack formation from pre-existing surface flaws and their subsequent extension along a circular trajectory, confirmative with the direction of the principal stress on the boundary. We further demonstrate that this unique ringlike fracture pattern, prevalent in damage produced by high-speed impact, can be best described by the Tuler-Butcher criterion for dynamic failure in brittle materials. The orientation of the ring fracture extension into the solid also follows closely with the trajectory of the local maximum tensile stress distribution.
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Affiliation(s)
- Ying Zhang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Chen Yang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Hao Qiang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708, USA
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41
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Abstract
Understanding the response of solid materials to shock loading is important for mitigating shock-induced damages and failures, as well as advancing the beneficial use of shock waves for material modifications. In this paper, we consider a representative brittle material, BegoStone, in the form of cylindrical bodies and submerged in water. We present a computational study on the causal relationship between the prescribed shock load and the resulting elastic waves and damage in the solid material. A recently developed three-dimensional computational framework, FIVER, is employed, which couples a finite volume compressible fluid solver with a finite element structural dynamics solver through the construction and solution of local, one-dimensional fluid-solid Riemann problems. The material damage and fracture are modeled and simulated using a continuum damage mechanics model and an element erosion method. The computational model is validated in the context of shock wave lithotripsy and the results are compared with experimental data. We first show that after calibrating the growth rate of microscopic damage and the threshold for macroscopic fracture, the computational framework is capable of capturing the location and shape of the shock-induced fracture observed in a laboratory experiment. Next, we introduce a new phenomenological model of shock waveform, and present a numerical parametric study on the effects of a single shock load, in which the shock waveform, magnitude, and the size of the target material are varied. In particular, we vary the waveform gradually from one that features non-monotonic decay with a tensile phase to one that exhibits monotonic decay without a tensile phase. The result suggests that when the length of the shock pulse is comparable to that of the target material, the former waveform may induce much more significant damage than the latter one, even if the two share the same magnitude, duration, and acoustic energy.
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Affiliation(s)
- S. Cao
- Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
| | - Y. Zhang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 90271, United States
| | - D. Liao
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 90271, United States
| | - P. Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 90271, United States
| | - K. G. Wang
- Department of Aerospace and Ocean Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, United States
- Corresponding author (K. G. Wang)
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Liao D, Li F, Lu D, Zhong P. Activation of Piezo1 mechanosensitive ion channel in HEK293T cells by 30 MHz vertically deployed surface acoustic waves. Biochem Biophys Res Commun 2019; 518:541-547. [PMID: 31451220 DOI: 10.1016/j.bbrc.2019.08.078] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 08/13/2019] [Indexed: 01/07/2023]
Abstract
Ultrasound (US) has emerged as a promising noninvasive modality for neuromodulation. Despite previous evidence that US may mediate cellular response by activating mechanosensitive ion channels embedded in the cell membrane, the underlying mechanism is not well understood. In this work, we developed a vertically deployed surface acoustic wave (VD-SAW) platform that generates 30 MHz focused ultrasound wave for mechanical stimulation of single cells. We investigated the role of Piezo1 in mediating the intracellular calcium response ( [Formula: see text] ) of HEK293T cells in response to pulsed US operated at a peak pressure of 1.6 MPa with 20% duty cycle, and a total treatment time of 60 s. We observed that the elicited calcium response depends critically on the pulse repetition frequency (PRF) or burst duration of the US, as well as the presence of the Piezo1. Significantly higher [Formula: see text] increase was produced in the Piezo1-transfected (P1TF) than in the Piezo1-knockout (P1KO) HEK293T cells. Furthermore, higher calcium response probability, stronger and faster [Formula: see text] increase, and greater cell displacement were produced at 2 Hz PRF with 100 ms burst duration than 200 Hz PRF with 1 ms burst duration. Altogether, we have demonstrated that the VD-SAW platform provides a unique and versatile tool for investigating US-induced mechanotransduction at the single cell level.
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Affiliation(s)
- Defei Liao
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Fenfang Li
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - David Lu
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC, 27708, USA.
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Abe S, Osada T, Kaneko K, Zhong P, Lyerly HK. Abstract 4071: A novel combination therapy of high intensity focused ultrasound and PDL1 blockades against advanced breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.am2019-4071] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background: Previous studies have reported that tumor debris and inflammation made by high-intensity focused ultrasound (HIFU) therapy induced the antitumor immune response, however, HIFU as a monotherapy is still not potent enough to eradicate tumors and treat distant metastasis. We have reported that mechanical HIFU (M-HIFU), that will mechanically destroy tumor cells/tissues through acoustic cavitation, induced stronger antitumor immune response compared to conventional thermal HIFU (T-HIFU) that will cause thermal ablation of tumors. In the present study, we established an immune based combination therapy of M-HIFU and immune checkpoint blockade to enhance systemic antitumor immune response and treated distant/metastatic tumors in murine breast cancer models.
Methods and Results: HER2 oncogene-dependent murine breast cancer cell line, MM3MG-HER2, was established in our lab. In mice with bilateral implantation of MM3MG-HER2 tumors, M-HIFU monotherapy induced stronger HER2-specific cellular response and inhibited the growth of HIFU-untreated distant tumors as well as HIFU treated-tumors, more potently than T-HIFU. Flow cytometry and immunohistochemical analysis of tumor microenvironment revealed significantly stronger accumulation of activated T cell and NK cells in M-HIFU-treated tumors. On the other hand, M-HIFU induced stronger expression of programmed death-ligand 1 (PD-L1) on various immune cells in both sides of tumors than T-HIFU therapy or no treatment control. Based on these findings, we investigated the combination therapy of M-HIFU and PD-1/PD-L1 axis blockades, and found significantly enhanced tumor-specific cellular immune response compared to each monotherapy, which resulted in improved therapeutic effect against distant tumors as well as HIFU treated-tumors. Furthermore, immune cell depletion studies demonstrated that both CD8+ T cells and NK cells played an essential role for the antitumor efficacy in this combinatory therapy against both HIFU-treated tumors and untreated distant tumors.
Conclusion: this study provides strong rational evidence that M-HIFU combined with PD-1/PD-L1 axis blockades could be a promising treatment strategy against advanced breast cancer with metastatic lesion.
Citation Format: Shinya Abe, Takuya Osada, Kensuke Kaneko, Pei Zhong, Herbert K. Lyerly. A novel combination therapy of high intensity focused ultrasound and PDL1 blockades against advanced breast cancer [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2019; 2019 Mar 29-Apr 3; Atlanta, GA. Philadelphia (PA): AACR; Cancer Res 2019;79(13 Suppl):Abstract nr 4071.
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Zhong P. Editorial Comment on: The Impact of Dust and Confinement on Fragmentation of Kidney Stones by Shockwave Lithotripsy in Tissue Phantoms by Randad et al. (From: Randad A, Ahn J, Bailey MR, et al. J Endourol 2019;33:400-406; DOI: 10.1089/end.2018.0516). J Endourol 2019; 33:407. [PMID: 30808186 DOI: 10.1089/end.2019.0157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina
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45
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Affiliation(s)
- Pei Zhong
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China
| | - Xinhong Qiu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China
| | - Jinyi Chen
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Wuhan, Hubei, China
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Zhao X, Luo M, Li Z, Zhong P, Cheng Y, Lai F, Wang X, Min J, Bai M, Yang Y, Cheng H, Zhou R. Chromosome-scale assembly of the Monopterus genome. Gigascience 2018; 7:4982940. [PMID: 29688346 PMCID: PMC5946948 DOI: 10.1093/gigascience/giy046] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2017] [Accepted: 04/16/2018] [Indexed: 01/10/2023] Open
Abstract
Background The teleost fish Monopterus albus is emerging as a new model for biological studies due to its natural sex transition and small genome, in addition to its enormous economic and potential medical value. However, no genomic information for the Monopterus is currently available. Findings Here, we sequenced and de novo assembled the genome of M. albus and report the de novochromosome assembly by FISH walking assisted by conserved synteny (Cafs). Using Cafs, 328 scaffolds were assembled into 12 chromosomes, which covered genomic sequences of 555 Mb, accounting for 81.3% of the sequences assembled in scaffolds (∼689 Mb). A total of 18 ,660 genes were mapped on the chromosomes and showed a nonrandom distribution along chromosomes. Conclusions We report the first reference genome of the Monopterus and provide an efficient Cafs strategy for a de novo chromosome-level assembly of the Monopterus genome, which provides a valuable resource, not only for further studies in genetics, evolution, and development, particularly sex determination, but also for breed improvement of the species.
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Affiliation(s)
- Xueya Zhao
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Majing Luo
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Zhigang Li
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Pei Zhong
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Yibin Cheng
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Fengling Lai
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Xin Wang
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
| | - Jiumeng Min
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, P. R. China
| | - Mingzhou Bai
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, P. R. China
| | - Yulan Yang
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, P. R. China
| | - Hanhua Cheng
- BGI Genomics, BGI-Shenzhen, Shenzhen 518083, P. R. China
| | - Rongjia Zhou
- Hubei Key Laboratory of Cell Homeostasis, Laboratory of Molecular and Developmental Genetics, College of Life Sciences, Wuhan University, Wuhan 430072, P. R. China
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He X, Zhong P, Qiu X. Remediation of hexavalent chromium in contaminated soil by Fe(II)-Al layered double hydroxide. Chemosphere 2018; 210:1157-1166. [PMID: 30208541 DOI: 10.1016/j.chemosphere.2018.07.048] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Revised: 06/21/2018] [Accepted: 07/09/2018] [Indexed: 05/25/2023]
Abstract
In this study, high-efficiency and low-cost Fe(II) and Al(III) layered double hydroxide (Fe-Al-LDH) was synthesized and used for the remediation of Cr(VI) contaminated soil. The Fe-Al-LDH characteristics were analyzed with different techniques. The results of X-ray diffraction (XRD) and transmission electron microscopy (TEM) analyses revealed its highly crystalline structure with sheet morphology, and a Brunauer-Emmett-Teller (BET) surface area of 46.85 m2/g. In addition, the remediation tests indicated that adding 1 g/L of Fe-Al-LDH to a solution of Cr(VI)-contaminated soil, at a soil to solution ratio of 1 g: 5 mL, completely immobilized the pre-adsorbed Cr(VI) in the soil (2079.84 mg/kg). Additionally, the Fe-Al-LDH could be used in a wide range of pH conditions and no Cr(VI) was detected in the leaching solution. Based on the characterization of X-Ray Diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, inductively coupled plasma mass spectrometry (ICP-MS), and X-ray photoelectron spectroscopy (XPS) analysis, it is proposed that adsorption and reduction may be involved in the mechanism of Cr(VI) immobilization by Fe-Al-LDH. At the beginning of the reaction, Cr(VI) entered the layer structure of the LDH or was adsorbed on the surface of the LDH. Then, Fe(II) was involved in reducing the Cr(VI) to Cr(III) and was oxidized to Fe(III). Part of the Cr(VI) and Cr(III) were co-precipitated with Fe(III) and Al (III) during the formation of iron oxide or hydroxide.
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Affiliation(s)
- Xin He
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Hubei 430073, China
| | - Pei Zhong
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Hubei 430073, China
| | - Xinhong Qiu
- School of Chemistry and Environmental Engineering, Wuhan Institute of Technology, Hubei 430073, China.
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Lau SY, Siau JW, Sobota RM, Wang CI, Zhong P, Lane DP, Ghadessy FJ. Synthetic 10FN3-based mono- and bivalent inhibitors of MDM2/X function. Protein Eng Des Sel 2018; 31:301-312. [PMID: 30169723 PMCID: PMC6277172 DOI: 10.1093/protein/gzy018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/10/2018] [Accepted: 08/10/2018] [Indexed: 12/17/2022] Open
Abstract
Engineered non-antibody scaffold proteins constitute a rapidly growing technology for diagnostics and modulation/perturbation of protein function. Here, we describe the rapid and systematic development of high-affinity 10FN3 domain inhibitors of the MDM2 and MDMX proteins. These are often overexpressed in cancer and represent attractive drug targets. Using facile in vitro expression and pull-down assay methodology, numerous design iterations addressing insertion site(s) and spacer length were screened for optimal presentation of an MDM2/X dual peptide inhibitor in the 10FN3 scaffold. Lead inhibitors demonstrated robust, on-target cellular inhibition of MDM2/X leading to activation of the p53 tumor suppressor. Significant improvement to target engagement was observed by increasing valency within a single 10FN3 domain, which has not been demonstrated previously. We further established stable reporter cell lines with tunable expression of EGFP-fused 10FN3 domain inhibitors, and showed their intracellular location to be contingent on target engagement. Importantly, competitive inhibition of MDM2/X by small molecules and cell-penetrating peptides led to a readily observable phenotype, indicating significant potential of the developed platform as a robust tool for cell-based drug screening.
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Affiliation(s)
- S -Y Lau
- p53 Laboratory (p53Lab), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Singapore, Singapore
| | - J W Siau
- p53 Laboratory (p53Lab), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Singapore, Singapore
| | - R M Sobota
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Dr, Singapore, Singapore
- Institute of Medical Biology (IMB), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Singapore, Singapore
| | - C -I Wang
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Singapore, Singapore
| | - P Zhong
- Singapore Immunology Network (SIgN), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Singapore, Singapore
| | - D P Lane
- p53 Laboratory (p53Lab), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Singapore, Singapore
| | - F J Ghadessy
- p53 Laboratory (p53Lab), Agency for Science, Technology and Research (A*STAR), 8A Biomedical Grove, Singapore, Singapore
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Carlos EC, Wollin DA, Winship BB, Jiang R, Radvak D, Chew BH, Gustafson MR, Simmons WN, Zhong P, Preminger GM, Lipkin ME. In Vitro Comparison of a Novel Single Probe Dual-Energy Lithotripter to Current Devices. J Endourol 2018; 32:534-540. [PMID: 29649900 DOI: 10.1089/end.2018.0143] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE The LithoClast Trilogy is a novel single probe, dual-energy lithotripter with ultrasonic (US) vibration and electromagnetic impact forces. ShockPulse and LithoClast Select are existing lithotripters that also use a combination of US and mechanical impact energies. We compared the efficacy and tip motion of these devices in an in vitro setting. MATERIALS AND METHODS Begostones, in the ratio 15:3, were used in all trials. Test groups were Trilogy, ShockPulse, Select ultrasound (US) only, and Select ultrasound with pneumatic (USP). For clearance testing, a single investigator facile with each lithotripter fragmented 10 stones per device. For drill testing, a hands-free apparatus with a submerged balance was used to apply 1 or 2 lbs of pressure on a stone in contact with the device tip. High-speed photography was used to assess Trilogy and ShockPulse's probe tip motion. RESULTS Select-USP was slowest and Trilogy fastest on clearance testing (p < 0.01). On 1 lbs drill testing, Select-US was slowest (p = 0.001). At 2 lbs, ShockPulse was faster than Select US (p = 0.027), but did not significantly outpace Trilogy nor Select-USP. At either weight, there was no significant difference between Trilogy and ShockPulse. During its US function, Trilogy's maximum downward tip displacement was 0.041 mm relative to 0.0025 mm with ShockPulse. Trilogy had 0.25 mm of maximum downward displacement during its impactor function while ShockPulse had 0.01 mm. CONCLUSIONS Single probe dual-energy devices, such as Trilogy and ShockPulse, represent the next generation of lithotripters. Trilogy more efficiently cleared stone than currently available devices, which could be explained by its larger probe diameter and greater downward tip displacement during both US and impactor functions.
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Affiliation(s)
- Evan C Carlos
- 1 Division of Urology, Duke University Medical Center , Durham, North Carolina
| | - Daniel A Wollin
- 1 Division of Urology, Duke University Medical Center , Durham, North Carolina
| | - Brenton B Winship
- 1 Division of Urology, Duke University Medical Center , Durham, North Carolina
| | - Ruiyang Jiang
- 1 Division of Urology, Duke University Medical Center , Durham, North Carolina
| | - Daniela Radvak
- 2 Department of Mechanical Engineering and Materials Science, Duke University , Durham, North Carolina
| | - Ben H Chew
- 3 Department of Urologic Sciences, University of British Columbia , Vancouver, Canada
- 4 Endourology Disease Group for Excellence (EDGE) Research Consortium
| | - Michael R Gustafson
- 2 Department of Mechanical Engineering and Materials Science, Duke University , Durham, North Carolina
| | - W Neal Simmons
- 2 Department of Mechanical Engineering and Materials Science, Duke University , Durham, North Carolina
| | - Pei Zhong
- 2 Department of Mechanical Engineering and Materials Science, Duke University , Durham, North Carolina
| | - Glenn M Preminger
- 1 Division of Urology, Duke University Medical Center , Durham, North Carolina
| | - Michael E Lipkin
- 1 Division of Urology, Duke University Medical Center , Durham, North Carolina
- 4 Endourology Disease Group for Excellence (EDGE) Research Consortium
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Fovargue D, Mitran S, Sankin G, Zhang Y, Zhong P. An experimentally-calibrated damage mechanics model for stone fracture in shock wave lithotripsy. Int J Fract 2018; 211:203-216. [PMID: 30349151 PMCID: PMC6195326 DOI: 10.1007/s10704-018-0283-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 04/05/2018] [Indexed: 05/22/2023]
Abstract
A damage model suggested by the Tuler-Butcher concept of dynamic accumulation of microscopic defects is obtained from experimental data on microcrack formation in synthetic kidney stones. Experimental data on appearance of microcracks is extracted from micro-computed tomography images of BegoStone simulants obtained after subjecting the stone to successive pulses produced by an electromagnetic shock-wave lithotripter source. Image processing of the data is used to infer statistical distributions of crack length and width in representative transversal cross-sections of a cylindrical stone. A high-resolution finite volume computational model, capable of accurately modeling internal reflections due to local changes in material properties produced by material damage is used to simulate the accumulation of damage due to successive shocks. Comparison of statistical distributions of microcrack formation in computation and experiment allows calibration of the damage model. The model is subsequently used to compute fracture of a different aspect-ratio cylindrical stone predicting concurrent formation of two main fracture areas as observed experimentally.
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Affiliation(s)
- Daniel Fovargue
- Department of Mathematics, University of North Carolina, Chapel Hill, North Carolina, 27599-3250
| | - Sorin Mitran
- Department of Mathematics, University of North Carolina, Chapel Hill, North Carolina, 27599-3250
| | - Georgy Sankin
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708
| | - Ying Zhang
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708
| | - Pei Zhong
- Department of Mechanical Engineering and Materials Science, Duke University, Durham, North Carolina 27708
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